Straw-cashier for threshing-machines



No. 39,061. PATEN'I'ED AUG. 13, 1,861.

L. BRONSON. I

STRAW CARRIER FOR THRESHING MACHINES.

WiTne-ssefs: n V 1 LEVI BRONSON, OF LOGKPORT, NEW YORK, ASSIGNOR TO HIMSELF, AND JAMES BRAYLEY,

OF BUFFALO, NEW YORK.

STRAW-CABBIER FOR THRESHING-MACHINES.

Specification of Letters Patent No. 33,061, dated August 13, 1861.

To all whom it may concern:

Be it known that I, LEVI BRONSON, of Lockport, in the county of Niagara and State of New York, have invented certain new and useful Improvements in Raddles for Separating Grain from Straw as it Passes Over it from the Threshiuglvlachine; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- I Figure 1 represents a perspective view of the raddle, and Fig. 2 represents, a longitudinal vertical section through the same.

Similar letters of reference where they occur in the separate figures denote like parts in both the drawings.

My invention consists in the manner in which I agitate the straw carrier, and adjust that agitation to the condition of the material that may be, for the time being, passing over it, so as to shake out the grain from the straw without checking the progress of the straw over the raddle.

To enable others skilled in the art to make and use my invention, 1 will proceed to describe the same with reference to the drawings.

A B, represent the sides of the raddle frame, and c the bottom thereofthe top being open. In the sides A B, are hung two shafts D E, one at or near each end thereof, upon which are drums F, for the belts G to run upon. These belts have legs a, a, a, &-c., fastened to them for the straw to rest upon.

Motion is given to the shaft D, from some moving part of the threshing machine to which the raddle is connected in the usual manner, through the crank b, or by a pulley and belt at one end thereofthe other end of said shaft, being provided with a crank wheel 0, to a wrist pin in which one end of the pitman H, is attached. At. about the center of the frame there is a rock-shaft I, furnished, at each of its ends underneath the belts, with a cross head J, that has friction rollers e, in each of its ends. On the end of the shaft 1, outside of the frame, there is secured an arm K, having a slot 7 cut longitudinally along its length, and in this slot there is placed an adjustable wrist pin 2', to which the other end of the pitman H is connected, so that the rotation of the shaft D, through its crank wheel 0, and the pitman H, and arm K, gives a rocking motion to the shaft 1, which can be adjusted by sliding the wrist pin 2', from or toward the center of motion, and thus the belts and raddle may have such motion as the condition of the material passing over it, may require. The arms or cross heads J, lift the belts with a gentle motion, and let them down again as gentlynot giving a sudden blow, or jar, while the friction rolls admit of the belts moving along without being impeded by contact with the arms.

The raising and lowering of the belts, is done, at different points along the line of their length, so that all parts of the raddle are more uniformly agitated, and the separation more uniformly accomplished. The farther the wrist i is moved out in its slot f, the less will be the motion given to the rock shaft, and its arms J, and consequently the less will be the motion given to the raddle. The raddle too, is let down by the same positive motion, and at the same speed exactly with which it was raised up, which is far superior in its action and result, to a spring motion, or a sudden falling motion, by the cam or lever being suddenly taken away from the belts, as is commonly practiced. A constant tremulous motion, is much superior to a motion produced by a blow or jar, in

effecting the separation of the grain from the straw.

Having thus fully described the nature and object of my invention, what I claim therein as new and desire to secure by Letters Patent is,

In combination with an open raddle traveling around pulleys or rollers, an adjustable shake motion when composed, of the rock shaft 1, with its slotted arm K, sliding wrist 2', and raising and lowering arms J, arranged and operating, substantially in the manner, and for the purpose, set forth.

LEVI BRONSON. 

